Automatic oil stop



Patented Sept. 20, 1932 l UNITED 'STATES GERTRUDE WILCOX, F MAYVILLE, NEW YORK AUTOMATIC orn STOP Application filed October 23, 1929. Serial No. 401,948. Y Y

The present invention relates to improvements in automatic oil stop, ticularly relates to a device whereby the drop in pressure in the oil system of an internal 5 combustion engine, dueto deficiency of oil close a valve in the fuel supply line, whereby fuel will be out off fromrthe carburetor and from the engine, resulting in a stoppage of the motor.

An object of the invention is to prevent damage to the bearings and to the parts ofengines through lack of oil.

Another object ofthe" invention is to proglvide a device for accomplishing the purpose above described, in which a compact operating unit is provided in thefuel and the oil lines of such a construction as to admit of its placing in the existing systems without entailing great modification.

lThe invention also contemplates a by-pass whereby fuel may be supplied to the carburetor to gain the nearest garage, where the oil may be replenished.

l/Vith the foregoing and other objects in view, the invention will be more fully described hereinafter, and will be more particularly pointed out in the claims appended M hereto. Y

In the drawing, wherein like symbols refer to like or corresponding parts throughout the several views,

Figure 1 is a diagrammatic View with parts shown in section and parts broken away of a fuel and oil system embodying the invention, and

Figure 2 is an enlarged fragmentary View partly in elevation and partly in seci tion, showing the control unit.

Referring more particularly to the drawing, 5 represents a vacuum tankv or other source of gasoline or fuel supply, from which the gasoline is adapted to flow through the pipe connections 6 and 7 to the carburetor 8.

The oil pump is shown at 9 and the oil gauge at 10, these parts being connected by the usual oil line and 12.

In accordance with the invention, the oil and fuel lines are brought close together,

and more par- .14 may be upon any head ora head Aand to the gang QOmPOSQ/ Cl 0f PPQS ll' ings. With a full supply of oil,` thefpressure and the Vdescent'of the gasoline'from the vacuum tank 5 to the carburetor 8A is underV the controlof a valve 18, which is controlled by thepressure or deficiency 'of pressure in m 'aleen une 111,12. Y i in the crank case, will automatically Vact to The valve 13, which is inthe embodiment d of the invention shown in the drawing illustrated as a ball valve, is mountedto reciprocate toward and froma seat 14 providedo'n`F^ the T -head 15 of the pipe Y7 Of course, this "so head or sleeve 15 might bemade separately or in one pieeevwith the pipe'?, and the seat part desired.v The ball valve 13 is smaller in'dianfieterv than the in- N ternal diameter ofthe portion ofthe `elbow/"G5 n16 in which it reciproc'ates, and it is urged `to the seat 14 by a coil springl. The ball valve 13 is adaptedto be engaged by a cup 18 of any other form, carried??? by and movable with a plunger rod 19, which 79 slides freely through a partition 20 useful for maintaining the fuel andthe oil siep- Iarated. A cup upon the opposite end of theplunger rod '19,.

or other head 21 is mounted forengaging against a ball or the like 22 75 adapted to close against a seat 23 in the sleeve 15 adjacent the coupling 241 of the sleeve ,with the oil pipe 11. The sleeve 157c0nnects with the companion oil pipe 12 at the. opposite side;- y

of the seat 23. vThe coilspring'25 is wound 80 about the' plunger' rod 19 having vone. end abutting=against the partition 20, and the other end against the head 21. The cup heads will'fit the spherical balls 13L`and 22.@-

A by-pass 26 connects with the pipes 6 and 85 7, and cuts out the control unit. The by-pass is provided with a valve 27 having an operating arm`28 which is controllable preferably from the drivers compartment ofthe auto-f6() mobile.

l In the use ofthe device, with oil upto a proper level in the crank case of the internal combustion engine, and the motor in operation, the pump 9 will supply'a forced circu-A f 95. lation of oil through the pipes 11 and 12,

e and 4also to all of the bear- `will be sufficient to. shift the ball 22 away from itsseat'23, whereby the body of oil may pass. e

e. as

liciency of oil in the kmotor crank case, the

resistance of the springs 1.7 and 25 will fail y to be overcome, and the valve 13 will become seated :upon the seat 14, thus cutting off the supply of gasoline to lthe carburetor 8; it being understood that the by-pass valve 27 vis normally closed, and is onlyopened when the motor has been automatically stopped through laclrof oil for the purpose ofallowing the-vehicleto get to the nearest service v station, wherethe loil supply may be replena bearing through which said rod horizontally slides, and a second spring backed by said partition and' engaging the oil valve to urge the same toV a closed position in opposition to the action of the pumped oil pressure.

GERTRUDE WILCOX.

ihed.` Thereupon, the valve 27 should 'be again Aclosed lto cause Vthe automatic operation of the control unit.` A

-It will be obvious that many .changes in the f construction, combination and arrangement of parts could be made, which could be used without departing from the spirit of my invention, and Ido not mean to limit the invention to such details, except as'particularly 4pointed out iu the claims.

Having thus described my invention, what 'I claim and desire to secure by Letters Patent ,of the United States is-:- 1. l'In .a device of the kind described, a

Y fuel line, an oil pressureiline, asleeve extending in common to `said lines, a spring ,pressed ball valve to engage one end lof the ysleeve for closing the fuel supply, a second spring pressed ball Yvalve to seat inthe opposite .end ofthe sleeve for closing theoil supply at the same time, the last mentioned valve being acted upon by the normal oil Vpressure-to move.v the same away from its c seat, and a connection between the valves whereby the said movement of the oil pres- 5`0 sure valve forces the opening of the fuel supply vvalve to allow the free passage of fuel through the fuel line.

2. In a device of the kind described, fa fuel line, an'oil pressure line, a sleeve extending incommon to` said lines, a fuel valve for closing` within one portion of said sleeve to .control the flow of fuel through the fue-l line, spring means engaging `said valve to nor- Vmally urge the same to a` closed position, an `oil Yvalve in the o il line adapted to close against a remote portion of the sleeve to control the flo-w of oil and openable in the direction of fuel pressure, arigid rod extending between said valves and` rigidly coupledto each valve, a partition in said tube separating said fuel and oil lines, and forming n 

